1. Department of Preventive Medicine and Biometrics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814
2. Current address: Navy Environmental Health Center, 620 John Paul Jones Circle, Suite 1100, Portsmouth, VA 23708-2197
3. Pulmonary Medicine Division, Department of Internal Medicine, Naval Medical Center, Portsmouth, VA
4. Department of Internal Medicine, Naval Medical Center, Portsmouth, VA. Current address: Kingsport Family Health Center, Kingsport, TN